Conical bi-cylindrical nail



FIG. 1 is a top perspective view of a conical bi-cylindrical nail showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a side view thereof;

FIG. 6 is a front/rear view thereof; and,

FIG. 7 is a top perspective view thereof. 

CLAIM The ornamental design for a conical bi-cylindrical nail, as shown. 